The nanoparticle purifying system (100a) includes a container (110) having an interior portion including a plurality of aluminum plates (120). Each of the plurality of aluminum plates (120) includes a solid filtering agent, such as activated charcoal and, optionally, sodium tetra borate. The container (110) can further include an inlet (130) for receiving polluted air, an outlet (140) for discharging purified air, and a pathway extending between the plurality of aluminum plates (120) from the inlet (130) to the outlet (140). The nanoparticle purifying system (100a) includes a removable lid (150) for disposing on the container (110). Each of the plurality of aluminum plates (120) can include an adhesive, such as hot glue and/or carpet glue, for attaching the solid filtering agent to the surfaces of the plurality of aluminum plates (120) and interior surfaces of the container (110).